76 lines
2.5 KiB
Java
76 lines
2.5 KiB
Java
package migration;
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import data.source.ModSource;
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import data.target.ModTarget;
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import etl.Extractor;
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import etl.Loader;
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import etl.Transformer;
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import utils.DataStorer;
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import utils.DataTransformer;
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import utils.StatementPreparerExtractor;
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import utils.StatementPreparerLoader;
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import java.sql.Connection;
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import java.sql.Date;
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import java.util.ArrayList;
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import java.util.List;
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public class ModMigration extends ETL<ModSource, ModTarget>
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{
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public ModMigration(final Connection source, final Connection target)
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{
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super(source, target);
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}
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@Override
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protected List<ModSource> extract()
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{
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final DataStorer<ModSource> dataStorer = (resultSet) -> {
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final var extractedData = new ArrayList<ModSource>();
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while (resultSet.next())
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{
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extractedData.add(new ModSource(
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resultSet.getInt("modId"),
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resultSet.getString("name"),
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resultSet.getDate("installationDate").toLocalDate(),
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resultSet.getBlob("binary")
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));
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}
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return extractedData;
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};
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final var sql = "select * from `mod`;";
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final StatementPreparerExtractor statementPreparer = (preparedStatement) -> {};
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return new Extractor<>(super.source, dataStorer, statementPreparer, sql).doExtract();
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}
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@Override
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protected List<ModTarget> transform(final List<ModSource> extractedData)
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{
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final DataTransformer<ModSource, ModTarget> transformer = (dataset) -> new ModTarget(
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dataset.getModId(),
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dataset.getName(),
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dataset.getInstallationDate(),
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dataset.getBinary()
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);
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return new Transformer<>(transformer, extractedData).doTransform();
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}
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@Override
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protected void load(final List<ModTarget> transformedData)
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{
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final StatementPreparerLoader<ModTarget> statementPreparerLoader = (preparedStatement, data) -> {
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preparedStatement.setInt(1, data.getModId());
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preparedStatement.setString(2, data.getName());
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preparedStatement.setDate(3, Date.valueOf(data.getModInstallationDate()));
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preparedStatement.setBinaryStream(4, data.getModBinary().getBinaryStream());
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};
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final var sql = "insert into \"mod\" values (?, ?, ?, ?)";
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new Loader<>(super.target, statementPreparerLoader, transformedData, sql).doLoad();
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}
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}
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